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  1. /*
  2.  * Copyright (C) 2006 Josef Cejka
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29.  
  30. #include <kbd.h>
  31. #include <fb.h>
  32. #include <ipc/ipc.h>
  33. #include <ipc/fb.h>
  34. #include <ipc/services.h>
  35. #include <errno.h>
  36. #include <key_buffer.h>
  37. #include <console.h>
  38. #include <unistd.h>
  39. #include <async.h>
  40. #include <libadt/fifo.h>
  41. #include <screenbuffer.h>
  42.  
  43. #define CONSOLE_COUNT 8
  44. #define MAX_KEYREQUESTS_BUFFERED 32
  45.  
  46. #define NAME "CONSOLE"
  47.  
  48. int active_console = 1;
  49.  
  50. struct {
  51.     int phone;      /**< Framebuffer phone */
  52.     int rows;       /**< Framebuffer rows */
  53.     int cols;       /**< Framebuffer columns */
  54. } fb_info;
  55.  
  56. typedef struct {
  57.     keybuffer_t keybuffer;
  58.     FIFO_CREATE_STATIC(keyrequests, ipc_callid_t , MAX_KEYREQUESTS_BUFFERED);
  59.     int keyrequest_counter;
  60.     int client_phone;
  61.     int used;
  62.     screenbuffer_t screenbuffer;
  63. } connection_t;
  64.  
  65. connection_t connections[CONSOLE_COUNT];
  66.  
  67. static int find_free_connection()
  68. {
  69.     int i = 0;
  70.    
  71.     while (i < CONSOLE_COUNT) {
  72.         if (connections[i].used == 0)
  73.             return i;
  74.         ++i;
  75.     }
  76.     return CONSOLE_COUNT;
  77. }
  78.  
  79.  
  80. static int find_connection(int client_phone)
  81. {
  82.     int i = 0;
  83.    
  84.     while (i < CONSOLE_COUNT) {
  85.         if (connections[i].client_phone == client_phone)
  86.             return i;
  87.         ++i;
  88.     }
  89.     return  CONSOLE_COUNT;
  90. }
  91.  
  92. /* Handler for keyboard */
  93. static void keyboard_events(ipc_callid_t iid, ipc_call_t *icall)
  94. {
  95.     ipc_callid_t callid;
  96.     ipc_call_t call;
  97.     int retval;
  98.     int i, j;
  99.     char c,d;
  100.     connection_t *conn;
  101.  
  102.     /* Ignore parameters, the connection is alread opened */
  103.     while (1) {
  104.         callid = async_get_call(&call);
  105.         switch (IPC_GET_METHOD(call)) {
  106.         case IPC_M_PHONE_HUNGUP:
  107.             ipc_answer_fast(callid,0,0,0);
  108.             /* TODO: Handle hangup */
  109.             return;
  110.         case KBD_PUSHCHAR:
  111.             /* got key from keyboard driver */
  112.            
  113.             retval = 0;
  114.             c = IPC_GET_ARG1(call);
  115.             /* switch to another virtual console */
  116.            
  117.             conn = &connections[active_console];
  118. //          if ((c >= KBD_KEY_F1) && (c < KBD_KEY_F1 + CONSOLE_COUNT)) {
  119.             if ((c >= '1') && (c < '1' + CONSOLE_COUNT)) {
  120.                 /*FIXME: draw another console content from buffer */
  121.  
  122.                 active_console = c - '1';
  123.                 conn = &connections[active_console];
  124.  
  125.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 0, NULL, NULL);
  126.                 ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  127.                 for (i = 0; i < conn->screenbuffer.size_x; i++)
  128.                     for (j = 0; j < conn->screenbuffer.size_y; j++) {
  129.                         d = get_field_at(&(conn->screenbuffer),i, j)->character;
  130.                         if (d && d != ' ')
  131.                             ipc_call_async_3(fb_info.phone, FB_PUTCHAR, d, j, i, NULL, NULL);
  132.                     }
  133.                 ipc_call_async_2(fb_info.phone, FB_CURSOR_GOTO, conn->screenbuffer.position_y, conn->screenbuffer.position_x, NULL, NULL);
  134.                 ipc_call_async(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL, NULL);
  135.  
  136.                 break;
  137.             }
  138.            
  139.             /* if client is awaiting key, send it */
  140.             if (conn->keyrequest_counter > 0) {    
  141.                 conn->keyrequest_counter--;
  142.                 ipc_answer_fast(fifo_pop(conn->keyrequests), 0, c, 0);
  143.                 break;
  144.             }
  145.            
  146.             /*FIXME: else store key to its buffer */
  147.             keybuffer_push(&conn->keybuffer, c);
  148.            
  149.             break;
  150.         default:
  151.             retval = ENOENT;
  152.         }      
  153.         ipc_answer_fast(callid, retval, 0, 0);
  154.     }
  155. }
  156.  
  157. /** Default thread for new connections */
  158. void client_connection(ipc_callid_t iid, ipc_call_t *icall)
  159. {
  160.     ipc_callid_t callid;
  161.     ipc_call_t call;
  162.     int consnum;
  163.     ipcarg_t arg1;
  164.  
  165.     if ((consnum = find_free_connection()) == CONSOLE_COUNT) {
  166.         ipc_answer_fast(iid,ELIMIT,0,0);
  167.         return;
  168.     }
  169.    
  170.     connections[consnum].used = 1;
  171.     connections[consnum].client_phone = IPC_GET_ARG3(call);
  172.     screenbuffer_clear(&(connections[consnum].screenbuffer));
  173.  
  174.     /* Accept the connection */
  175.     ipc_answer_fast(iid,0,0,0);
  176.    
  177.     while (1) {
  178.         callid = async_get_call(&call);
  179.         switch (IPC_GET_METHOD(call)) {
  180.         case IPC_M_PHONE_HUNGUP:
  181.             /* TODO */
  182.             ipc_answer_fast(callid, 0,0,0);
  183.             return;
  184.         case CONSOLE_PUTCHAR:
  185.            
  186.             /* Send message to fb */
  187.             if (consnum == active_console) {
  188.                 ipc_call_async_3(fb_info.phone, FB_PUTCHAR, IPC_GET_ARG2(call), connections[consnum].screenbuffer.position_y, \
  189.                         connections[consnum].screenbuffer.position_x, NULL, NULL);
  190.             }
  191.            
  192.             screenbuffer_putchar(&(connections[consnum].screenbuffer), IPC_GET_ARG2(call));
  193.             break;
  194.         case CONSOLE_CLEAR:
  195.             /* Send message to fb */
  196.             if (consnum == active_console) {
  197.                 ipc_call_async_2(fb_info.phone, FB_CLEAR, 0, 0, NULL, NULL);
  198.             }
  199.            
  200.             screenbuffer_clear(&(connections[consnum].screenbuffer));
  201.            
  202.             break;
  203.         case CONSOLE_GOTO:
  204.            
  205.             screenbuffer_goto(&(connections[consnum].screenbuffer), IPC_GET_ARG1(call), IPC_GET_ARG2(call));
  206.            
  207.             break;
  208.  
  209.         case CONSOLE_GETCHAR:
  210.             if (keybuffer_empty(&(connections[consnum].keybuffer))) {
  211.                 /* buffer is empty -> store request */
  212.                 if (connections[consnum].keyrequest_counter < MAX_KEYREQUESTS_BUFFERED) {      
  213.                     fifo_push(connections[consnum].keyrequests, callid);
  214.                     connections[consnum].keyrequest_counter++;
  215.                 } else {
  216.                     /* no key available and too many requests => fail */
  217.                     ipc_answer_fast(callid, ELIMIT, 0, 0);
  218.                 }
  219.                 continue;
  220.             };
  221.             keybuffer_pop(&(connections[consnum].keybuffer), (char *)&arg1);
  222.            
  223.             break;
  224.         }
  225.         ipc_answer_fast(callid, 0, arg1, 0);
  226.     }
  227. }
  228.  
  229. int main(int argc, char *argv[])
  230. {
  231.     ipcarg_t phonehash;
  232.     int kbd_phone, fb_phone;
  233.     ipcarg_t retval, arg1 = 0xdead, arg2 = 0xbeef;
  234.     int i;
  235.  
  236.     async_set_client_connection(client_connection);
  237.    
  238.     /* Connect to keyboard driver */
  239.  
  240.     while ((kbd_phone = ipc_connect_me_to(PHONE_NS, SERVICE_KEYBOARD, 0)) < 0) {
  241.         usleep(10000);
  242.     };
  243.    
  244.     if (ipc_connect_to_me(kbd_phone, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  245.         return -1;
  246.     };
  247.     async_new_connection(phonehash, 0, NULL, keyboard_events);
  248.  
  249.     /* Connect to framebuffer driver */
  250.    
  251.     while ((fb_info.phone = ipc_connect_me_to(PHONE_NS, SERVICE_VIDEO, 0)) < 0) {
  252.         usleep(10000);
  253.     }
  254.    
  255.     ipc_call_sync_2(fb_info.phone, FB_GET_CSIZE, 0, 0, &(fb_info.rows), &(fb_info.cols));
  256.     ipc_call_sync(fb_info.phone, FB_CURSOR_VISIBILITY, 1, NULL);
  257.    
  258.     /* Init virtual consoles */
  259.     for (i = 0; i < CONSOLE_COUNT; i++) {
  260.         connections[i].used = 0;
  261.         keybuffer_init(&(connections[i].keybuffer));
  262.        
  263.         connections[i].keyrequests.head = connections[i].keyrequests.tail = 0;
  264.         connections[i].keyrequests.items = MAX_KEYREQUESTS_BUFFERED;
  265.         connections[i].keyrequest_counter = 0;
  266.        
  267.         if (screenbuffer_init(&(connections[i].screenbuffer), fb_info.cols, fb_info.rows ) == NULL) {
  268.             /*FIXME: handle error */
  269.             return -1;
  270.         }
  271.     }
  272.    
  273.     if (ipc_connect_to_me(PHONE_NS, SERVICE_CONSOLE, 0, &phonehash) != 0) {
  274.         return -1;
  275.     };
  276.    
  277.     async_manager();
  278.  
  279.     return 0;  
  280. }
  281.